The API wlansap_get_valid_freq was used to get new SAP channel
when country code changed from world mode to non world mode.
In STA+SAP concurrency case, SAP may be force SCC to STA channel
or the other band's channel. And If STA is disconnected, normally
the SAP should move back to original channel frequency on 5 GHz or
6 GHz. But in current code the API wlansap_get_valid_freq will
still be invoked to get new SAP channel based on PCL after STA
is disconnected. It is not expected.
Fix by add new master_ch_list_updated flag to indicate
the master channel list has been changed from 2.4 GHz only to
2.4 GHz + 5/6 GHz and based on the flag to invoke
wlansap_get_valid_freq to get new SAP channel.
The move back to original channel has been handled by
policy_mgr_is_sap_restart_required_after_sta_disconnect.
Change-Id: I33b7a4cda3b45221b45e2aec85069477d0999d4e
CRs-Fixed: 3596546
0084ccba11